Rob Gronkowski ruled out with concussion

WATCH: Referees' controversial call kept Patriots close in AFC title game

The Jaguars were flagged for 15 yards due to unnecessary roughness.

According to the Boston Herald's Karen Guregian, Gronkowski is in the concussion protocol, but there's optimism he will be able to play in the Super Bowl.

"I just tried to dislodge the ball". Woozy after taking a helmet-to-helmet from S Barry Church late in the first half, Gronk was labeled "questionable" at halftime. "I tried to lead with my shoulder". They can either aim high and risk making helmet-to-helmet contact, or they can go low and risk seriously injuring an opponent's legs.

Gronkowski looked out of sorts as he got up and was taken back to the locker room for tests.

The five-time Pro Bowler started 14 games for the Patriots this past season, and racked up over 1,000 yards on 69 catches. CBS sportscaster Tracy Wolfson reports both an independent neurologist and the team's medical staff are treating the tight end in the locker room, as they determine whether he will enter the league's concussion protocal.

Quarterback Tom Brady credited offensive coordinator Josh McDaniels with making adjustments after Gronkowski went out. "It was a tough shot he took, and he's as tough as they come, so hopefully he feels better soon".

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